Which visualization technique is most appropriate for showing inter-device communications in a network?

• A. Network graph
• B. Flow chart
• C. Gantt chart
• D. Histogram

Answer: (A)

Visualizing how devices talk to each other is about showing relationships and data flow between entities. A network graph does this by representing each device as a node and each communication as an edge, with options to encode direction, volume, or type of traffic through edge arrows, thickness, or color. This makes it easy to see which devices communicate most, identify central hubs, and spot patterns or bottlenecks in the network. In contrast, a flow chart maps steps in a process, a Gantt chart tracks timelines and schedules, and a histogram shows the distribution of a single metric—none of these capture the inherent connections between devices in a network.